Buffer solutions have constant acidity and alkalinity because (a) these give unionised acid or ba...

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Buffer solutions have constant acidity and alkalinity because
(a) these give unionised acid or base on reaction with added acid or alkali.
(b) acids and alkalies in these solutions are shielded from attack by other ions.
(c) they have large excess of H^+or OH^-ions
(d) they have fixed value of pH

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